Azmi, Randi Nurrosyid, Naufan Lee, Sang-Hak Al Mubarok, Muhibullah Lee, Wooseop Hwang, Sunbin Yin, Wenping Tae Kyu Ahn Kim, Tae-Wook Ryu, Du Yeol Do, Young Rag Jang, Sung-Yeon 2024-01-19T17:33:07Z 2024-01-19T17:33:07Z 2022-01-25 2020-05 2380-8195 https://pubs.kist.re.kr/handle/201004/118651 While perovskite solar cells (PSCs) have emerged as promising low-cost solar power generators, most reported high-performance PSCs employ electron transport layers (ETLs, mainly TiO2) treated at high temperatures (>= 450 degrees C), which may eventually hinder the development of flexible PSCs. Meanwhile, the development of low- temperature processed PSCs (L-PSCs) possessing performance levels comparable to those of high-temperature processed PSCs has actively been reported. In this study, L-PSCs with improved long-term stability and negligible hysteresis were developed through the effective passivation of shallow and deep traps in organic-inorganic hybrid perovskite (OIHP) crystals and at the ETL/OIHP interface. L-PSCs with alkaline chloride modification achieved state-of-the-art performance among reported L-PSCs (power conversion efficiency (PCE) = 22.6%) with a long-term shelf life. The origin of long-term stability and the efficient passivation of deep traps was revealed by monitoring the trap-state distribution. Moreover, the high PCE of a large-area device (21.3%, 1.12 cm(2)) was also demonstrated, confirming the uniformity of the modification. English AMER CHEMICAL SOC Shallow and Deep Trap State Passivation for Low-Temperature Processed Perovskite Solar Cells Article 10.1021/acsenergylett.0c00596 1 ACS ENERGY LETTERS, v.5, no.5, pp.1396 - 1403 ACS ENERGY LETTERS 5 5 1396 1403 N scie scopus 000535176100008 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article ORGANOMETAL HALIDE PEROVSKITES HIGHLY EFFICIENT STABILITY CATIONS FILMS